The Constitution is right next to the Regents Canal, a short walk along the towpath from Camden Lock. When we got there at Sunday lunchtime there were only a couple of people there. The beer was nice and the garden out the back over looking the canal would be lovely in the sunshine. The Oktoberfest beer was lovely.
I would like to go back to this pub when its busy and have a good night out. Definitely a pub worth stopping at if you are walking along the Regents Canal.